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c. F. WOODRUFF, oF. NFWBFn-N, TENNESSEE..

I Letters .Patent No. 77,700, dated May '5, 1868.'

- v IMPROVEMENT merca-WHEELS.

TO WHOMII'll MAY (JONCIEB/Jtl':y

Beit known that '1, C. F. WOODRUFF, of lIl'ewbermin the county-of Dyer, and State of Tennessee, have 4invented a new and useful Improvement in Spur-Wheels and l'II do hereby declare that the following is a full,

clear, ,andexact description thereof, which'will enable those skilled in the art to 'malte 'and use the same, reference being had tothe-accompanying drawings, forming part of this specification, in' which* f Figure 1 represents a side view 'of .my improved spur-wheel, with a portion of the sectional rimirexnoved,

showing the tenon of thecogs.;

Figure 2 lrepresents afface view,with some of the lsegs removed,'showing' the double dove-tail mortise in the two sides of the sectional segments of the rim.

IFigure 3 is a cross-section through the rim' andccg, taken in the line :c iig. la

Figure 4 is a section throngh-th'ecogs, showing the double dove-tail tenons binding the sectional segments of `the rim together.

Similar'letters of reference indicate corresponding parts.

.This invention relates to improvements-in Wooden (or cast-iron) spur-wheels, and consists in constructing' the rim in sectional segments, cut in'. the plane of the wheel centrally, and having the ends of the segments lap, so as to break joints, which sectionalsegments aren-held 'together by means of the double doye'ftail tenons or Shanks onAthecog's tting vin corresponding mortises in the two sections', and also in uniting the arms of the wheel to the rim by passing their ends between-.the innerfor shank-ends' of two contiguous ccgs, forming adove.

tail connection, 'that issecnred 4by bolts,A as hereinafter more particularly described.

. The rim of the wheel is formed. in segments, Aand Az; which areflaid side by side, so as to break joints, as shown clearly in all the drawings, i y

` The cogs B B hav'eftheir shanks a ama-de in the form'of aidouble dote-tailtenomthat'fits in a correspond,- ing mortise, e, made inlthe two sections of vthe rim, one half in each side, 'as shown clearly in 2.'

v The cogs are keyed'upby keys .c c`, through the shanksfinside of th/eriui, in the usualway, which binds the side sections of the rim together, l.and the ends of the segments of the ri'm 'are made to abut inthe centre:

of themortise for theshanks of the co'gs, so'that they are alscdrawn and'held tog'ether'by thedove-tail tenen at the same time thatthe'side sectionsfareunited bykeyi ng up'the cogs,

Themms C O ofithewhcel arepermanently: united to .fthe rim of the wheel byforming :theirends in a Ydove-tail s hape, which is fitted between the Shanks a a of two ,contiguous c'ogsB B, as shownv clearly/iu iig. 1.

The shanks of the'cog'slare pinned fast to the armby.pi ns 11. Having described myiinve'ntion, I claim as new, land desire to secure by Letters Patent- Ilr The rim of a spur-wheel, as constructed and cast in sectional 'segments A A,united yand boundtogether by the double dove-tail'shanks a a ofthe cogs B B, in the manner `herein described.

2. The double` dove-tail Shanks d a of the cogs B B, in combination with the sectional segments A A con structed, arranged, and operating substantially as and for the purpose described. 3. The combination of the arms Cl C,`the -shanks a a, the pins b l, and the lsectional segment rim, constructed, arranged, and operating substantially as and for" the purpose described.- I'

Y A f Y 0; F. WOODRUFF.-

Witnesses:

J. G..Tncxs a A.. M. HARPER. 

